Valve.



P. MCGARTHY.

` VALVE. APPLICATION FILED DEC. 20, 1910,

1 Patented Aug. 29, 1911.

z sums-1111x1111.

P. MUGABTHX.

VALVE.

APPLICATION IILEI')` DEO.20, 1910.

Patented Aug. 29, 1911.

2 ,SHEETS-SHEET 2.

nnifinn STATES PATENT OFFICE.

FELIX MGOARTHY, 0F POTTSTOWN, PENNSYLVANIA.

VALVE.

inpj io lie: a 'nll. vlaai'. anil exact ilescritiiii'nfi iinpi-ovenwnia in valves :nul niortl pai'iiin-v lailj.' to ihai; clasica lm'own as blow oli' valves and is primaily an improvement on my for niet' laieni4 ''r'lfisih (laii'r'l (.)c'iolwi 4. 1904, anil my ohjei't is to provide a sliding pisi on ithin tho vali-o hotly, onil portion of which ia proi'iileil with an inwoning; aflapieifl to rein isha' with the outlet poi-i in the valve hoily.

A'furrther ohjeet, is to prmjiilo packing rings for 'the piston anrl so arrange .fi-aid riinzjs thaiI when the` valve is closed a ringr l will he on 4each .f-:it'le of the 4outlet port.

A lin-ihm" ohjofzt, is to prov'iili a stein intl moans for )notingr the saine' lengthwise to open o1' closfl the piston.

A4 fui'tlnclobject. is i0 provide moans for niovahly attaching the stein io the' piston, anil= a fui-'thier ohjfei. t0 l'novirle means io 'lilvet pressure on the packing rings to exparnl the naine when the valve is eloael.

Other ohjiui; ani] aflvanlagea will he heroinafi'ei sei` foi'ilifangl pointed ont in the speciiication.

l'n the aeconnuanyinp; rlrawinggi, 'which are niaile a part oi this application, Figure@ is ,a longitudinal oeniral sectional View through the viilve. Fig. 2 is an end elevation thereof, and1 lfipj. a sectional 'View as seen on line 3&3, Fig. 1..

Refei'i'imgto the drawings, in which simi lar reference numerals designate corresponding parts throughout the several lview's, 1 indicates the valve-- casing,` which` is preferably eylindifieal-Shaped and is pmviderl at one end 4with an inlet port 2 anrl in its length withV ln. 1i j "ally plfejeting outlet port 3. .Fitting n the easing' 1 s a` llniingr 4 prelierahly of l.nass,`whieh prevents the interior of the valve from .corrodng,-one end ofthe lining; resting against a I@boulder 5V at that end of the 'casing' in which the inlet portis formed, -while the opposite enol is engageilbya cap G, which fits over the 0pposit@ end o the Casing. i Slidably mounted Specification of Letters Pateili-.H'ligyHQ-{m 29,' '1911' Application med member 2o, 1910. I

Serial No. 598,308.

within the caaingr ia a pinion T, whivh iA also pl'eifeiahlycyliniliir-al, the inner enil por tion tlni'eo'l.1 heinlnj of .Quijh liaineiv as.' io .snugly iii' within the lining); anil 4aiil enil is iolanrunjgiil :'.fio ahnt. against ilwt.l houiller when the valve is eloaefl. A portion o'l' the piston is reiluom! io i'iifeive a ali-ove 9 lieiwvon one i-nrl oi' whii-.h an'fl a li-i'l-l'e il? ioinwil h y i'i-flui'inif the :size of lh'o piston` is a packing; ring` l0, whili.I a similaiparking' ring! ll is plai'ml ai ilu op'iiorliie mul oi iliil sli-eve. The pif-.ion ia opwaliil hy means ol a sioni '12. whif-h i-; pi'oviihil wiih (.\:ti\ irn ilneatls iii ainl vinfagl'ma iln'vaihin a ihiinhle l-l o,\'iinilii.lf`r iln'ougrh lha i-ap i? so that when ilu' ihin'lhle is ifoia'iwl ilul .tti-n will he niovvcl lenlgihwiw. The innol nfl oi the 'rsiiln proviiliil willi a heail lf3, whirfh in [01's the opening` in the pi ion -ainl nun'- ahly conneii'eil io the pinion h i' antioniliiigg a Siml'liolt() into thel heuil anil through a pai'- tiiioii 1T" the pisioini'hal' elnl of the` Htnil projecting i'h'l'mnijh thiA l'ra'l'tii'i'on having; loc'kinig nnia .iti tlni'mnn The siuil holi is of Such leinfih iliaiY the luai'l can mow a iiia ianife into the pision iler ille pir-lion hasheen Suaieil on the yahonlih'l]- :7 :nul in milt-i' i0 einplo)I snol! movement io (,:innpi'af' the edges ofil'ie'packing: iingra'ii) an'il il io oxpanil the saine laterally. 'the ouiol' enil oi ilw lieail l5 is |'n'o\='i loil Wiih an extension 1li), in which is im'inoi'l a cil'rzuin'lereniial (1han- .nel Q0, io receive the onieiI mul of iho piston, the depth oij ihe channel lacing anch asio eoinpensate- :For: ille mmfeineni oi the'head in the piston.

ly providing` the i'hannel 'in Vthe extension '19 a flange 91. if; formed which engages ihe packing' ring' fil and is of sullieient extent-'io normallyY hohl. the end of the piston a clistai'i(:i."fi' n'|'| the inner cnil o'lihe channel. lliy eonstrnr'ting' the heini in this mannen* and connecting the Same io the pirsiim'i, 'aS shown', if ihe valve ahonhl h'ahP when the enil of the piston is movefl against the ahonliler 5, a slight additional inrn of the ihinihlo Alll will force the flange 2l inwardly anal thereby 'direct preasln'e-against the: two pai-king rings and the Sleeve, 'rainning Saiil parking rii'igs to'expanil laterally snlieienily to (mm-l. pletely stop the leakage. The packing rings will only remain in their expru'uied position so long as the pressure of the flange is dreeted thereon and as soon as the thiinhle is operated to open the valve, the first. action Awill be to remove the pressure of the flange fro!l the packing rin s, the piston remain-y ing stationary until t e locking nuts have been moved against the partition of the piston. That portion of the piston adjacent the inlet port isV provided with an opening v22, which is adapted to register with the l 'outlet port 3 when the piston is opened to .thimble to rotate with the hand Wheel.

its :Eulll extent and to prevent the steam, etc.

from passing through the opening in the piston, a plug 23 is threaded into the interior vof the reduced yportion of thepiston at a point between the opening 22 and the Jpartition 17. It will lfurther be seen that by threading the plug into the piston it can be readilyI removed to gain access to the lockin nuts a'nd'stud bolt. The stem l2v is held against rotation by cutting away the'teeth atone point to form a passage 2.4, into which projects a tongue 25 carried by a col lar 26, said collarrbeing seated in the open ing in the cap 6 and is stationary therein. A hand wheel 27 is threaded onto thekupper end of the thimble 14' and is fixed thereto by means of a set screw 28, which causes ltpe ie inner end of the thimble is vprovided with a flange 29, which engagesa shoulderBO in the capi 6 and prevents the-thimble from moving lengthwise. The head 15 is held -in proper alinement withl the iston l7 by attaehinr guide pins 3l to the head of the piston an Aextending the same through openings in' the extensionon the head.

It will be seen thatthe valve when closed will normally preventl'eakage in vielw of the- .,fact thatpthe end 'ofthe piston is seated against the shoulder.V It` will likewise be ing, and it Ywill likewise beseen that when the hand wheel is rotated Iin Ithe opposite direction to open the valve, the pressure Will 4be removed from the packing rings, thus permitting the same to assume their normal condition, so that the valve canqhe readily opened.

lVhat I claim is:

l. A valve of t-he class described, comprising a hollow casing having an inlet port at one end and an outlet port in the side of the casing and at right angles thereto, a piston slidably mountedin the casing, a pair vof packing rings surrounding the piston, a sleeve between said packing rings, a stem havin a head adapted to enter the piston, means to movably attach the head to the piston and means on the head to direct pressure on the packing rings and expand the same laterally when the piston is closed.

2. A valveof the class described, comprising a hollow casing having an inlet port at one endand an outlet port in the Side of the casing and at right angles thereto, a piston slidably mounted in the casing7 a pair of packing rings'surrounding the piston, a` lsleeve between said packing rings, a stem having a head adapted to enter the piston,

oiithe outer end of the'head provided with a circumferential channel to receive the outer end of the piston to direct pressure on the -75 packing rings when the piston is closed.

4In testimony whereof I have signed my name 'to this specification in the presence of two subscribing witnesses.

, FELIX MC'CARTHY.

lVitnesses: p .Y

J L -HowAlzn KENNEY, FELIX MCCAn'rHY, Jr. 

